Sonic and the Freedom Fighters
face Robotnik's forces in their
final assault on Robotnik's
forces. Sonic and Sally admit
their love for each other. After
nearly being Roboticized, Sonic
recovers the Deep Power Stone
that Robotnik had, and destroys
the Doomsday Project with Sally,
casting Robotnik into the Void
as they do so. The ending leads
to a cliffhanger that involves
Snively and a mysterious
red-eyed character (Ixis Naugus).